You'd be unlikely to improve the specimen by trying to extract it from the flint. Part of the reason it is noticeable now is because of its weathering. If you try to grind or dissolve the flint away, you'd be exposing fresh flint, in which the fossil would not stand out nearly as well (because it is all flint). Only by sawing a flat surface then polishing it (or maybe varnishing it), might you see something of interest, and even then it would probably be only an outline; not worth it for the safety risk and effort.